OPA1612AIDR - 1.1nV/√Hz Dual Audio Op Amp | Texas Instruments
部品番号: OPA1612AIDR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.7911 | $0.79 |
| 10 | $0.7911 | $7.91 |
| 100 | $0.7911 | $79.11 |
| 500 | $0.7911 | $395.55 |
| 1,000 | $0.7911 | $791.10 |
OPA1612AIDR 概要
What is a bipolar-input operational amplifier? A bipolar-input operational amplifier uses bipolar transistor input devices to provide low-voltage noise and precise analog signal handling. In the broader hierarchy, an operational amplifier is an analog IC, an amplifier IC, and part of a signal-conditioning or active-filter system. Audio applications require low noise, low total harmonic distortion, adequate output drive, and predictable behavior with capacitive and feedback networks.
The verified data identifies the OPA1612 as a high-performance audio amplifier with 1.1 nV/√Hz noise density. The manufacturer datasheet states rail-to-rail output swing to within 600 mV with a 2 kΩ load and output drive capability of ±30 mA. Those figures help preserve dynamic range and allow the amplifier to drive downstream audio stages more effectively than a low-current precision op amp. The OPA1612AIDR is identified as an 8-SOIC, dual-circuit device.
The bipolar input architecture is intended for low-noise audio signal conditioning rather than general-purpose low-power sensing. Its distortion specification of 0.000015% at 1 kHz is particularly relevant for headphone buffers, mixing-console stages, active crossovers, and studio signal paths. The rail-to-rail output characteristic improves usable swing near the supply limits, although input and output common-mode behavior must still be checked against the system rails.
Typical applications include stereo line-input amplification, headphone-driver buffering, active low-pass and high-pass filters, microphone preamplifier stages, audio ADC drivers, and balanced audio signal-chain interfaces. The dual-channel configuration reduces the number of amplifiers required in a stereo design while keeping the two channels in one standard 8-SOIC footprint.
The principal design consideration is to preserve low-noise performance with suitable bypassing, stable feedback compensation, and careful grounding. Keep input and feedback traces short, place decoupling capacitors close to the supply pins, and account for the amplifier’s ±30 mA output-drive capability when selecting the next stage. For a direct PCB substitution, confirm the exact package, pinout, supply range, and electrical limits against the replacement datasheet.
ドロップイン代替品: OPA1612AIDR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: OPA1612AIDR （同一形状・フットプリント） — 相違点: Distortion, Number of Channels, Package, RoHS Status.
クイック比較ツール — 並列比較する代替部品を選択:
OPA1612AIDRGT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
OPA1612AIDRGR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
OPA1612AID
✅ ドロップイン📋 参考代替品（カタログ未掲載）
OPA1612A
✅ ドロップイン📋 参考代替品（カタログ未掲載）
OPA1612AIDRGT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPA6120A2DWPG4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
OPA1612AIDR 最大定格＆電気的特性
| Number of Channels | 2 |
| Input Type | Bipolar input |
| ノイズ密度 | 1.1 nV/√Hz |
| Distortion | 0.000015% at 1 kHz |
| Output Swing | Rail-to-rail to within 600 mV with a 2 kΩ load |
| Output Drive Capability | ±30 mA |
| パッケージ | 8-pin SOIC |
| Circuit Type | Dual operational amplifier |
| Application | Professional audio and sound applications |
| 動作温度 | -40 °C to +85 °C |
| 実装タイプ | Surface mount |
| MSL | MSL Level 2, 260 °C, 1 year |
| RoHS ステータス | RoHS3 compliant |
| REACH Status | REACH compliant |
OPA1612AIDR 8-pin soic ピン配置ガイド
OPA1612AIDR (8-pin soic パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: OPA1612AIDR.
詳細は データシート をご参照ください。
主な用途
OPA1612AIDR の用途: 6 件s: Professional Audio Line Buffer, Headphone Output Driver, Active Audio Crossover, Microphone Preamplifier, Audio ADC Input Driver, Balanced Audio Interface.
Professional Audio Line Buffer
OPA1612AIDR fits a stereo line-buffer stage because it combines a 1.1 nV/√Hz noise density with very low 0.000015% distortion at 1 kHz. Place one channel ahead of each line input and use the dual SOIC to reduce external amplification stages. The manufacturer-verified ±30 mA output drive provides useful margin for downstream audio circuitry, while rail-to-rail output swing to within 600 mV into a 2 kΩ load helps preserve signal range. The exact supply limits must be confirmed from the complete datasheet.
おすすめ
Headphone Output Driver
OPA1612AIDR is suitable for a headphone-buffer or line-driver experiment when the load is within the device’s verified drive capability. Its ±30 mA output current and rail-to-rail output swing can increase usable headroom compared with a low-current amplifier, while the 1.1 nV/√Hz noise density helps preserve quiet signal paths. It is not a substitute for a dedicated power headphone amplifier without checking load current, voltage swing, thermal behavior, and stability.
おすすめ
Active Audio Crossover
Use OPA1612AIDR in an active low-pass or high-pass audio crossover where low noise and low distortion matter in the passband. Its 1.1 nV/√Hz noise density reduces the amplifier’s contribution to quiet listening levels, while the 0.000015% distortion figure at 1 kHz helps preserve waveform fidelity around the crossover region. The dual package can implement two channels, but resistor and capacitor values must be calculated from the desired poles and checked against the complete datasheet.
おすすめ
Microphone Preamplifier
OPA1612AIDR can serve as a low-noise stage around microphone or line-level audio sources when the circuit operates within the verified supply and common-mode limits. The bipolar-input architecture and 1.1 nV/√Hz noise density are aligned with low-level signal conditioning, while the dual package allows two microphone channels to share one device. Proper input biasing, gain-setting resistors, grounding, and feedback compensation are essential; the supplied data does not provide offset or bias-current values.
おすすめ
Audio ADC Input Driver
OPA1612AIDR is appropriate for driving an audio-conversion front end when the downstream ADC requires low distortion and a low-noise analog source. The amplifier’s 0.000015% distortion at 1 kHz supports high-fidelity signal transfer, and its rail-to-rail output swing can provide useful range when supply limits permit. Place the amplifier close to the ADC input, use short traces, and verify the ADC’s input bandwidth, settling requirements, and recommended driver topology before finalizing the design.
おすすめ
Balanced Audio Interface
OPA1612AIDR can support balanced audio signal conditioning in studio, instrument, or communications equipment where low-noise amplification is required on each polarity. Its dual-channel architecture simplifies paired positive and negative signal paths, and the 1.1 nV/√Hz noise density helps limit added circuit noise. The output swing and ±30 mA drive capability are useful for downstream line drivers, but common-mode range, supply voltage, stability, and channel-to-channel matching must be verified before production use.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: OPA1612AIDR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | OPA1612AIDRGT | OPA1612AIDRGR | OPA1612AID | OPA1612A | TPA6120A2DWPG4 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
主な差別化要因
- Very low verified noise density （vs OPA1612AID)
- Audio-focused distortion specification （vs OPA1612AIDRGT)
- Dual-channel implementation （vs TPA6120A2DWPG4)
設計ノート
Place the supply-bypass capacitors close to the OPA1612AIDR supply pins and keep the input, feedback, and output traces short. The verified 1.1 nV/√Hz noise density describes the device, not the complete PCB; long traces, shared return paths, and inductively coupled switching nodes can dominate the system noise floor. Follow the recommended application layout in the Texas Instruments datasheet.
Use the manufacturer’s recommended feedback network and verify stability with the intended load and cable capacitance. The verified specification of ±30 mA output drive does not establish capacitive-load tolerance or bandwidth. In particular, do not assume that a high-current output stage is automatically stable with every audio cable, headphone transducer, or ADC input; confirm these conditions experimentally and from the datasheet.
Keep analog and digital return currents separated as far as the board architecture allows, and use a quiet ground reference for the audio path. The rail-to-rail output swing to within 600 mV with a 2 kΩ load is useful, but the available headroom depends on the actual supply voltage and load. Confirm supply limits and output-current limits before using the part as a line or headphone driver.
コンプライアンス情報
The supplied cross-reference result identifies OPA1612AIDR as RoHS3 compliant, REACH compliant, and MSL Level 2 at 260 °C for one year. AEC-Q100 status, lead-free status, halogen-free status, and conflict-minerals status are not established by the supplied data.